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Drug Delivery

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https://www.readbyqxmd.com/read/30183420/a-local-drug-delivery-system-based-on-visible-light-cured-glycol-chitosan-and-doxorubicin%C3%A2-hydrochloride-for-thyroid-cancer-treatment-in-vitro-and-in-vivo
#1
Youngbum Yoo, Sun-Jung Yoon, So Yeon Kim, Deok-Won Lee, Sewook Um, Hoon Hyun, Sung Ok Hong, Dae Hyeok Yang
Systemic drug delivery systems (SDDSs) for thyroid cancer treatment are associated with serious side effects including nausea, anorexia, and hair loss as a result of damage to normal tissues. In this study, we investigated the feasibility of a local DDS (LDDS) based on visible light-cured glycol chitosan (GC) hydrogel and doxorubicin⋅hydrochloride (DOX⋅HCl), called GC10/DOX, on thyroid cancer treatment in vivo. Visible light irradiation increased the storage modulus and swelling ratio of the GC10/DOX hydrogel precursor...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/30182757/touch-actuated-microneedle-array-patch-for-closed-loop-transdermal-drug-delivery
#2
Jingbo Yang, Zhipeng Chen, Rui Ye, Jiyu Li, Yinyan Lin, Jie Gao, Lei Ren, Bin Liu, Lelun Jiang
To date, only approximately 20 drugs synthesized with small molecules have been approved by the FDA for use in traditional transdermal patches (TTP) owing to the extremely low permeation rate of the skin barrier for macromolecular drugs. A novel touch-actuated microneedle array patch (TMAP) was developed for transdermal delivery of liquid macromolecular drugs. TMAP is a combination of a typical TTP and a solid microneedle array (MA). High doses of liquid drug formulations, especially heat-sensitive compounds can be easily filled and stored in the drug reservoir of TMAPs...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/30176744/nose-to-brain-delivery-of-temozolomide-loaded-plga-nanoparticles-functionalized-with-anti-epha3-for-glioblastoma-targeting
#3
Liuxiang Chu, Aiping Wang, Ling Ni, Xiuju Yan, Yina Song, Mingyu Zhao, Kaoxiang Sun, Hongjie Mu, Sha Liu, Zimei Wu, Chunyan Zhang
Glioblastoma is the most common malignant brain tumor. Efficient delivery of drugs targeting glioblastomas remains a challenge. Ephrin type-A receptor 3 (EPHA3) tyrosine kinase antibody-modified polylactide-co-glycolide (PLGA) nanoparticles (NPs) were developed to target glioblastoma via nose-to-brain delivery. Anti-EPHA3-modified, TBE-loaded NPs were prepared using an emulsion-solvent evaporation method, showed a sustained in vitro release profile up to 48 h and a mean particle size of 145.9 ± 8.7 nm. The cellular uptake of anti-EPHA3-modified NPs by C6 cells was significantly enhanced compared to that of nontargeting NPs (p < ...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/30107760/curcumin-loaded-plga-peg-nanoparticles-conjugated-with-b6-peptide-for-potential-use-in-alzheimer-s-disease
#4
Shengnuo Fan, Yuqiu Zheng, Xuan Liu, Wenli Fang, Xiaoyu Chen, Wang Liao, Xiuna Jing, Ming Lei, Enxiang Tao, Qiulan Ma, Xingmei Zhang, Rui Guo, Jun Liu
Alzheimer's disease is a neurodegenerative disorder mainly characterized by β-amyloid deposit and tau hyperphosphorylation with no curative treatments. Curcumin (Cur) has been proved to have potential use in Alzheimer's disease with its anti-amyloid, anti-inflammatory, and anti-oxidant properties, etc. However, its hydrophobicity and low bioavailability hinder its application. In this paper, we designed a novel brain-target nanoparticle, poly(lactide-co-glycolide)-block-poly(ethylene glycol) (PLGA-PEG) conjugated with B6 peptide and was loaded with Cur (PLGA-PEG-B6/Cur) and administered it into HT22 cells and APP/PS1 Al transgenic mice...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/30105918/sodium-stibogluconate-loaded-nano-deformable-liposomes-for-topical-treatment-of-leishmaniasis-macrophage-as-a-target-cell
#5
M Junaid Dar, Fakhar Ud Din, Gul Majid Khan
Topical drug delivery against cutaneous leishmaniasis (CL) signifies an effective alternate for improving the availability and reducing the toxicity associated with the parenteral administration of conventional sodium stibogluconate (SSG) injection. The basic aim of the study was to develop nano-deformable liposomes (NDLs) for the dermal delivery of SSG against CL. NDLs were formulated by a modified thin film hydration method and optimized via Box-Behnken statistical design. The physicochemical properties of SSG-NDLs were established in terms of vesicle size (195...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/30044159/self-assembled-pegylated-albumin-nanoparticles-span-as-a-platform-for-cancer-chemotherapy-and-imaging
#6
Jung Eun Lee, Myung Goo Kim, Yeon Lim Jang, Min Sang Lee, Nak Won Kim, Yue Yin, Jong Han Lee, Su Yeon Lim, Ji Won Park, Jaeyun Kim, Doo Sung Lee, Sun Hwa Kim, Ji Hoon Jeong
Paclitaxel (PTX) is used as a major antitumor agent for the treatment of recurrent and metastatic breast cancer. For the clinical application of PTX, it needs to be dissolved in an oil/detergent-based solvent due to its poor solubility in an aqueous medium. However, the formulation often causes undesirable complications including hypersensitivity reactions and limited tumor distribution, resulting in a lower dose-dependent antitumor effect. Herein, we introduce a facile and oil-free method to prepare albumin-based PTX nanoparticles for efficient systemic cancer therapy using a conjugate of human serum albumin (HSA) and poly(ethyleneglycol) (PEG)...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/30044154/modified-translationally-controlled-tumor-protein-derived-protein-transduction-domain-enhances-nasal-delivery-of-exendin-4-as-shown-with-insulin
#7
Hae-Duck Bae, Moonhee Kim, Joohyun Lee, Kyunglim Lee
Protein transduction domains (PTDs) have been shown to promote the delivery of therapeutic proteins or peptides into the living cells. In a previous study, we showed that the double mutant of TCTP-PTD 13, TCTP-PTD 13M2, was more effective in the delivery of insulin than the wild-type TCTP-PTD 13. In this study, we applied this approach to the nasal delivery of a different peptide, exendin-4, using as carriers, several modified TCTP-PTDs, such as TCTP-PTD 13M1, 13M2, and 13M3. Nasal co-administration of TCTP-PTD 13M2 with exendin-4 showed the highest exendin-4 uptake among the three analogs in normal rats, and also decreased blood glucose levels by 43...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/30044149/intravenous-delivery-of-a-liposomal-formulation-of-voriconazole-improves-drug-pharmacokinetics-tissue-distribution-and-enhances-antifungal-activity
#8
Danillo F M C Veloso, Naiara I G M Benedetti, Renato I Ávila, Thiago S A Bastos, Thaísa C Silva, Maria R R Silva, Aline C Batista, Marize C Valadares, Eliana M Lima
Voriconazole (VCZ), a triazole with a large spectrum of action is one of the most recommended antifungal agents as the first line therapy against several clinically important systemic fungal infections, including those by Candida albicans. This antifungal has moderate water solubility and exhibits a nonlinear pharmacokinetic (PK) profile. By entrapping VCZ into liposomes, it is possible to circumvent certain downsides of the currently available product such as a reduction in the rate of its metabolization into an inactive form, avoidance of the toxicity of the sulfobutyl ether-beta-cyclodextrin (SBECD), vehicle used to increase its solubility...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/30043675/efficient-treatment-of-parkinson-s-disease-using-ultrasonography-guided-rhfgf20-proteoliposomes
#9
Jianlou Niu, Junjun Xie, Kaiwen Guo, Xiaomin Zhang, Feng Xia, Xinyu Zhao, Lintao Song, Deli Zhuge, Xiaokun Li, Yingzheng Zhao, Zhifeng Huang
Fibroblast growth factor-20 (FGF20) is a paracrine member of the FGF family that is preferentially expressed in the substantia nigra pars compacta (SNpc). Previous studies have demonstrated that FGF20 enhances the survival of dopaminergic neurons suggesting the potential use of FGF20 to treat Parkinson's disease (PD). However, the reduced solubility of the bacterial recombinant human FGF20 (rhFGF20) and the absence of efficient strategies to transport rhFGF20 across the blood-brain barrier (BBB) have halted its clinical application...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/30022695/superior-anti-neoplastic-activities-of-triacontanol-peg-conjugate-synthesis-characterization-and-biological-evaluations
#10
Yimeng Zhou, Ning Li, Zhixia Qiu, Xiaoyu Lu, Min Fang, Xijing Chen, Lili Ren, Guangji Wang, Pingkai Ouyang
Triacontanol (TA, C30 H62 O), abundantly present in plant cuticle waxes and bee waxes, has been found to display promising anti-neoplastic potentials. As a long chain fatty alcohol, TA possesses limited aqueous solubility, which hinders its medicinal application. To overcome its solubility barrier, a polymer prodrug was synthesized through attaching TA to poly ethylene glycol (PEG), using succinic acid as a linker with bifunctional amide and ester bonds. Anti-neoplastic effects of PEG-TA were assessed in LoVo and MCF7 cells, anti-proliferative and apoptosis-inducing activities were subsequently confirmed in mouse xenograft model...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29996694/stabilized-tetraether-lipids-based-particles-guided-prophyrins-photodynamic-therapy
#11
Gihan Mahmoud, Jarmila Jedelská, Samia Mohamed Omar, Boris Strehlow, Marc Schneider, Udo Bakowsky
Photodynamic therapy (PDT) that involves ergonomically delivered light in the presence of archetypical photosensitizer such as Protoporphyrin IX (PpIX) is a time-honored missile strategy in cancer therapeutics. Yet, the premature release of PpIX is one of the most abundant dilemma encounters the therapeutic outcomes of PDT due to associated toxicity and redistribution to serum proteins. In this study, ultrastable tetraether lipids (TELs) based liposomes were developed. PpIX molecules were identified to reside physically in the monolayer; thereby the inherent π-π stacking that leads to aggregation of PpIX in aqueous milieu was dramatically improved...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29996687/porous-silicon-based-intravitreal-platform-for-dual-drug-loading-and-controlled-release-towards-synergistic-therapy
#12
David Warther, Ying Xiao, Fangting Li, Yuqin Wang, Kristyn Huffman, William R Freeman, Michael Sailor, Lingyun Cheng
The number of blind and low vision persons in the US is projected to increase to 5.68 million by 2020. The eye diseases causing loss of vision are life-long, chronic, and often need protracted presence of therapeutics at the disease site to keep the disease in remission. In addition, multiple pathologies participate in the disease process and a single therapy seems insufficient to bring the disease under control and prevent vision loss. This study demonstrates the use of porous silicon (pSi) particles sequentially loaded with daunorubicin (DNR) and dexamethasone (DEX) to create a synergistic intravitreally injectable dual-drug delivery system...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29968512/advanced-physical-techniques-for-gene-delivery-based-on-membrane-perforation
#13
Xiaofan Du, Jing Wang, Quan Zhou, Luwei Zhang, Sijia Wang, Zhenxi Zhang, Cuiping Yao
Gene delivery as a promising and valid tool has been used for treating many serious diseases that conventional drug therapies cannot cure. Due to the advancement of physical technology and nanotechnology, advanced physical gene delivery methods such as electroporation, magnetoporation, sonoporation and optoporation have been extensively developed and are receiving increasing attention, which have the advantages of briefness and nontoxicity. This review introduces the technique detail of membrane perforation, with a brief discussion for future development, with special emphasis on nanoparticles mediated optoporation that have developed as an new alternative transfection technique in the last two decades...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29968496/the-paradigm-shift-for-drug-delivery-systems-for-oral-and-maxillofacial-implants
#14
Rafal Pokrowiecki
Along with the development of nanotechnological strategies for biomaterials associated with the prevention of infections, a myriad of clinically unproven techniques have been described to date. In this work, the aim was to perform a critical analysis of the literature available concerning antibacterial biomaterials for oral implantology and to provide a practical derivation for such a purpose. As anti-adhesive strategies may affect osseointegration, they should no longer be recommended for inclusion in this class of biomaterials, despite promising results in biomedical engineering for other, non-bone load bearing organs...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29943651/localized-co-delivery-of-collagenase-and-trastuzumab-by-thermosensitive-hydrogels-for-enhanced-antitumor-efficacy-in-human-breast-xenograft
#15
Anni Pan, Zhaoyang Wang, Binlong Chen, Wenbing Dai, Hua Zhang, Bing He, Xueqing Wang, Yiguang Wang, Qiang Zhang
Modulation of the collagen-rich extracellular matrix (ECM) in solid tumors by the treatment with collagenase has been proved effective in enhancement of the interstitial transport and antitumor efficacy of antibodies. We, therefore, developed a PLGA-PEG-PLGA polymer-based thermosensitive hydrogel, which incorporated a HER2-targeted monoclonal antibody trastuzumab and collagenase (Col/Tra/Gel) for peritumoral administration. HER2-positvie BT474 tumor-bearing mice were selected as a model. The Col/Tra/Gel showed the continuous and biphasic release of protein drugs for 9 days in vitro...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29916268/anti-gpc3-antibody-modified-sorafenib-loaded-nanoparticles-significantly-inhibited-hepg2-hepatocellular-carcinoma
#16
Xiaolong Tang, Longzhou Chen, Amin Li, Shiyu Cai, Yinci Zhang, Xueke Liu, Zhenyou Jiang, Xinkuang Liu, Yong Liang, Dong Ma
Sorafenib (SFB) has improved the treatment of hepatocellular carcinoma (HCC) and has fewer severe side effects than other agents used for that purpose. However, due to a lack of tumor-specific targeting, the concentration of the drug in tumor tissue cannot be permanently maintained at a level that inhibits tumor growth. To overcome this problem, we developed a novel SFB-loaded polymer nanoparticle (NP). The NP (a TPGS-b-PCL copolymer that was synthesized from ε-caprolactone and d-α-tocopheryl polyethylene glycol 1000 succinate (TPGS) via ring-opening polymerization) contains Pluronic P123 and SFB, and its surface is modified with anti-GPC3 antibody to produce the polymer nanoparticle (NP-SFB-Ab)...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29909706/hyaluronic-acid-doxorubicin-nanoassembly-releasing-microspheres-for-the-transarterial-chemoembolization-of-a-liver-tumor
#17
Song Yi Lee, Jin Woo Choi, Jae-Young Lee, Dae-Duk Kim, Hyo-Cheol Kim, Hyun-Jong Cho
Doxorubicin (DOX)-loaded, hyaluronic acid-ceramide (HACE) nanoassembly-releasing poly(lactic-co-glycolic acid) (PLGA) microspheres (MSs) were developed for transarterial chemoembolization (TACE) therapy of liver cancer. DOX/HACE MSs with a mean diameter of 27 μm and a spherical shape were prepared based on the modified emulsification method. Their in vitro biodegradability in artificial biological fluids was observed. A more sustained drug release pattern was observed from DOX/HACE MS than from DOX MS at pH 7...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29902933/a-nanoparticle-based-approach-to-improve-the-outcome-of-cancer-active-immunotherapy-with-lipopolysaccharides
#18
Maryam A Shetab Boushehri, Mona M A Abdel-Mottaleb, Arnaud Béduneau, Yann Pellequer, Alf Lamprecht
This study sought to develop a simple nanoparticle-based approach to enhance the efficiency and tolerability of lipopolysaccharide (LPS), a potent ligand of Toll-like Receptor 4 (TLR4), for immunotherapy in cancer. Despite holding promise within this context, the strong pro-inflammatory properties of LPS also account for its low tolerability given localized and systemic side effects, which restrict the administrable dosage. Herein, we investigated the effect of LPS decoration as a surface-active molecule on a polymeric matrix upon its efficiency and tolerability...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29902927/improved-lymphatic-targeting-effect-and-mechanism-of-synthetic-borneol-on-lymph-node-uptake-of-7-ethyl-10-hydroxycamptothecin-nanoliposomes-following-subcutaneous-administration
#19
Tiantian Ye, Yue Wu, Lei Shang, Xueqing Deng, Shujun Wang
Borneol as a penetration enhancer is widely used in guiding other components through the biological barrier into the targeting organs or tissues. This study aimed at studying effect and mechanism of synthetic borneol (S-BO) on improving lymphatic-targeting ability of 7-ethyl-10-hydroxycamptothecin liposomes (SN-38-Lips) via increasing lymph node uptake. At first, SN-38-Lips prepared had appropriate particle distribution, drug loading property and compatible stability with S-BO. Both in vitro cellular uptake and in vivo fluorescence imaging showed that 2 and 5 mg/mL S-BO, especially 2 mg/mL S-BO, enhanced cytoplasmic fluorescence signal of SN-38-Lips in the macrophages based on phagocytosis effect...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29902922/ultrahigh-verapamil-loaded-controlled-release-polymeric-beads-using-superamphiphobic-substrate-d-optimal-statistical-design-in-vitro-and-in-vivo-performance
#20
Carol Yousry, Maha M Amin, Ahmed H Elshafeey, Omaima N El Gazayerly
Controlled-release multiparticulate systems of hydrophilic drugs usually suffer from poor encapsulation and rapid-release rate. In the present study, ultra-high loaded controlled release polymeric beads containing verapamil hydrochloride (VP) as hydrophilic model drug were efficiently prepared using superamphiphobic substrates aiming to improve patient compliance by reducing dosing frequency. Superamphiphobic substrates were fabricated using clean aluminum sheets etched with ammonia solution and were treated with 1...
November 2018: Drug Delivery
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